Emedia center at josh school has a computer area. the first four rows have have six computers. the fifth row has four computers. how many computers are there in all

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Adifferent website gives the cost for the first train as £56.88 and the second train as £20.11 with a £9.50 charge for cycle storage for the whole trip. how much would the journey cost you?

Ill mark the brainliest if you me with the these three questions 7,8,9